21464023 has 8 divisors (see below), whose sum is σ = 24946560. Its totient is φ = 18085560.

The previous prime is 21464017. The next prime is 21464029. The reversal of 21464023 is 32046412.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21464017) and next prime (21464029).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21464023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21463985 and 21464003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21464029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25573 + ... + 26398.

It is an arithmetic number, because the mean of its divisors is an integer number (3118320).

Almost surely, 2^21464023 is an apocalyptic number.

21464023 is a deficient number, since it is larger than the sum of its proper divisors (3482537).

21464023 is an equidigital number, since it uses as much as digits as its factorization.

21464023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52037.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 21464023 is about 4632.9281237679. The cubic root of 21464023 is about 277.9097018810.

The spelling of 21464023 in words is "twenty-one million, four hundred sixty-four thousand, twenty-three".